1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/dma/amd/ae4dma/ae4dma.h b/drivers/dma/amd/ae4dma/ae4dma.h
new file mode 100644
index 000000000000..265c5d436008
--- /dev/null
+++ b/drivers/dma/amd/ae4dma/ae4dma.h
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * AMD AE4DMA driver
+ *
+ * Copyright (c) 2024, Advanced Micro Devices, Inc.
+ * All Rights Reserved.
+ *
+ * Author: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
+ */
+#ifndef __AE4DMA_H__
+#define __AE4DMA_H__
+
+#include <linux/device.h>
+#include <linux/dmaengine.h>
+#include <linux/dmapool.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
+
+#include "../ptdma/ptdma.h"
+#include "../../virt-dma.h"
+
+#define MAX_AE4_HW_QUEUES		16
+
+#define AE4_DESC_COMPLETED		0x03
+
+#define AE4_MAX_IDX_OFF			0x08
+#define AE4_RD_IDX_OFF			0x0c
+#define AE4_WR_IDX_OFF			0x10
+#define AE4_INTR_STS_OFF		0x14
+#define AE4_Q_BASE_L_OFF		0x18
+#define AE4_Q_BASE_H_OFF		0x1c
+#define AE4_Q_SZ			0x20
+
+#define AE4_DMA_VERSION			4
+#define CMD_AE4_DESC_DW0_VAL		2
+
+struct ae4_msix {
+	int msix_count;
+	struct msix_entry msix_entry[MAX_AE4_HW_QUEUES];
+};
+
+struct ae4_cmd_queue {
+	struct ae4_device *ae4;
+	struct pt_cmd_queue cmd_q;
+	struct list_head cmd;
+	/* protect command operations */
+	struct mutex cmd_lock;
+	struct delayed_work p_work;
+	struct workqueue_struct *pws;
+	struct completion cmp;
+	wait_queue_head_t q_w;
+	atomic64_t intr_cnt;
+	atomic64_t done_cnt;
+	u64 q_cmd_count;
+	u32 dridx;
+	u32 tail_wi;
+	u32 id;
+};
+
+union dwou {
+	u32 dw0;
+	struct dword0 {
+	u8	byte0;
+	u8	byte1;
+	u16	timestamp;
+	} dws;
+};
+
+struct dword1 {
+	u8	status;
+	u8	err_code;
+	u16	desc_id;
+};
+
+struct ae4dma_desc {
+	union dwou dwouv;
+	struct dword1 dw1;
+	u32 length;
+	u32 rsvd;
+	u32 src_hi;
+	u32 src_lo;
+	u32 dst_hi;
+	u32 dst_lo;
+};
+
+struct ae4_device {
+	struct pt_device pt;
+	struct ae4_msix *ae4_msix;
+	struct ae4_cmd_queue ae4cmd_q[MAX_AE4_HW_QUEUES];
+	unsigned int ae4_irq[MAX_AE4_HW_QUEUES];
+	unsigned int cmd_q_count;
+};
+
+int ae4_core_init(struct ae4_device *ae4);
+void ae4_destroy_work(struct ae4_device *ae4);
+void ae4_check_status_error(struct ae4_cmd_queue *ae4cmd_q, int idx);
+#endif